questions of my research. My particular interest focuses on species interactions in temperate and Arctic regions and on the effects alien marine organisms on native coastal ecosystems. Mathias Wegner Parasites [...] on transgenerational plasticity (parental environment effects on offspring traits) in response to ocean warming. So far, I can say that maternal effects play an important role in populations’ adaptive responses

unique and fragile ecosystems Observe Arctic fish stocks and the impact of the arrival of more temperate species Life in a frozen ocean: analogues to other ocean planets and bioprospecting with new potential [...] drift expeditions between 2025 and 2045. During these 20 years, 10 year-long drift studies in the Arctic Ocean are planned. The work is based on the collaboration of an international and interdisciplinary [...] Station was baptized in Lorient, France, in April 2025 and will realize the first drift in the Arctic Ocean starting in summer 2026. Before this, different test campaigns are planned, including a shorter

(but opposite in sign) as the oceanic component today suggests that ocean uptake of 14CO2 today is close to natural pre-bomb conditions. However, if we extrapolate the oceanic component of the global 14CO2 [...] 14C values in the surface ocean by +15 in the north and by -15 in the circum- Antarctic ocean after the WOCE survey (and interpolating this adjustment linearly between the Arctic and Antarctica), (iii) changed [...] biosphere are indispensable. Over the ocean, in addition to long-term, regionally resolved monitoring, also surface ocean water 14C measurements to determine the ocean–atmosphere 14C disequilibrium are needed

German Norwegian Ocean Forum
From the Arctic to the North Sea: this year’s German Norwegian Ocean Forum was held in Bremen’s Übersee Museum. The spotlight topic of the symposium, which was jointly organised [...] by the AWI, Innovation Norway, and the Royal Norwegian Embassy, was ‘The sustainable future of our oceans’. AWI Director Antje Boetius moderated the event.

Rachold /AWI) (Photo: Alfred Wegener Institut) What is submarine permafrost? Subsea permafrost in the Arctic is generally relict terrestrial permafrost, inundated after the last glaciation and now degrading [...] Beaufort Sea, we know little about the distribution of submarine permafrost for most of the shallow Arctic Shelf, over 80% of which lies offshore of Eastern Siberia. Degradation rates of the ice-bearing [...] concentration. We need to know more about the current distribution and state of permafrost beneath the ocean, about what cause sit thaw, where and how quickly. This group addresses key questions surrounding

snow isn’t just snow. There are clear differences if you compare, e.g., the Arctic and Antarctic. While the snow on the Arctic sea ice is completely melting over the course of the year, and so-called meltwater [...] effectively it insulates, and as such reduces the transfer of heat from the ocean to the atmosphere. However, the less warmth the ocean gives off, the thinner the sea ice remains. Therefore the snow not only [...] 23.09.2019 Scientists Prepare for Year-Long Expedition to Arctic Center Find out more > EOS | 06.09.2019 Light Permeates Seasonally Through Arctic Sea Ice Find out more > Dialogue & Lectures Lecture | 09

the international level and within the framework of intergovernmental bodies (eg SCAR, IASC, ATCM, Arctic Council, CCAMLR, OSPAR). The office is coordinating the AWI contributions and will perform as an [...] d communication for inter-institutional networks (DAM, DKK, Helmholtz Climate, KDM, UN Decade of Ocean Science, IPCC, IPBES, Leopoldina, etc.), in which the research contributions of the AWI / of Helmholtz

O values in ice and water samples from the Arctic and Antarctic, as well as the δ 13 C values of dissolved inorganic carbon in the water of the polar oceans. In addition, our laboratories offer the possibility [...] input) and changes in the supply of nutrient silicon and its use in polar and subpolar ocean regions (e.g. Southern Ocean, North Pacific) can be reconstructed on geological time scales. For the measurements [...] Clumped isotopes δ 13 C + δ 18 O (biog. carbonate, foraminifers) Option: clumped isotopes Changes in ocean circulation, nutrient content and deep water ventilation (δ 13 C) Hydrographic changes (δ 18 O, Δ47)

Grant Changes of water isotopes in Arctic Sea ice, Ocean, and atMosphere (CiASOM) (2021-2024) The main goal of the Changes of water isotopes in Arctic Sea ice, Ocean, and atMosphere (CiASOM) project is [...] this end, caves and permafrost exposure will be studied in East Siberia along a transect from the Arctic Ocean to the Lake Baikal. The objectives of the project are to: (i) Reconstruct (a) mean interglacial [...] to provide a comprehensive description of the present-day Arctic water cycle and related key exchange processes between the atmosphere, ocean, and sea ice, using both instrumental data and climate simulations

snow represents an important fresh water input, which affects density and salinity layers of the ocean. Besides its direct climatic impact, the snow layer also adds to the uncertainty of sea ice thickness [...] vessel. Snow buoy, deployed on sea ice (Photo: Alfred Wegener Institut) We deploy snow buoys in the Arctic and Antarctic. They are equipped with echo sounders to record changes at the snow surface. Buoy data